<template>
  <div>
    <div class="user-info-head" @click="editCropper()">
      <div class="avatar" title="点击上传头像">
        <el-avatar style="font-size: 50px;" icon="el-icon-user-solid" :size="100" :src="options.img" :key="options.img" alt="avatar" ></el-avatar>
      </div>
    </div>
    <el-dialog :title="title" :visible.sync="open" width="800px" append-to-body @opened="modalOpened"  @close="closeDialog">
      <el-row>
        <el-col :xs="24" :sm="12" :md="12" :lg="12" :style="{height: '350px'}">
          <vue-cropper
            ref="cropper"
            :img="options.img"
            :info="true"
            :autoCrop="options.autoCrop"
            :autoCropWidth="options.autoCropWidth"
            :autoCropHeight="options.autoCropHeight"
            :fixedBox="options.fixedBox"
            @realTime="realTime"
            v-if="visible"
          />
        </el-col>
        <el-col :xs="24" :sm="12" :md="12" :lg="12">
          <el-row type="flex" align="middle" justify="center" style="height: 350px;">
            <el-col class="avatar-upload-preview">
              <img :src="previews.url" :style="previews.img"  alt="avatar"/>
            </el-col>
          </el-row>
        </el-col>
        <el-col :xs="24" :sm="12" :md="12" :lg="12">
          <el-row>
            <el-col :xs="24" :sm="12" :md="12" :lg="11" class="mg-t-10">
              <el-upload action="#" :http-request="requestUpload" :show-file-list="false" :before-upload="beforeUpload">
                <el-button size="small">
                  选择
                  <i class="el-icon-upload el-icon--right"></i>
                </el-button>
              </el-upload>
            </el-col>
            <el-col :xs="24" :sm="12" :md="12" :lg="12" class="mg-t-10">
              <el-row :gutter="10">
                <el-col :xs="6" :sm="6" :md="6" :lg="6">
                  <el-button icon="el-icon-plus" size="small" @click="changeScale(1)"></el-button>
                </el-col>
                <el-col :xs="6" :sm="6" :md="6" :lg="6">
                  <el-button icon="el-icon-minus" size="small" @click="changeScale(-1)"></el-button>
                </el-col>
                <el-col :xs="6" :sm="6" :md="6" :lg="6">
                  <el-button icon="el-icon-refresh-left" size="small" @click="rotateLeft()"></el-button>
                </el-col>
                <el-col :xs="6" :sm="6" :md="6" :lg="6">
                  <el-button icon="el-icon-refresh-right" size="small" @click="rotateRight()"></el-button>
                </el-col>
              </el-row>
            </el-col>
          </el-row>
        </el-col>
        <el-col :xs="24" :sm="12" :md="12" :lg="12" class="mg-t-10">
          <el-row type="flex" align="middle" justify="center">
            <el-button type="primary" size="small" @click="uploadImg()">提 交</el-button>
          </el-row>
        </el-col>
      </el-row>
    </el-dialog>
  </div>
</template>

<script>
import {mapMutations, mapState} from "vuex";

export default {
  computed: {
    ...mapState({
      userInfo: state => state.user.userInfo
    })
  },
  props: {
    //大小
    size: {
      type: Number,
      default: 120
    },
  },
  data() {
    return {
      // 是否显示弹出层
      open: false,
      // 是否显示cropper
      visible: false,
      // 弹出层标题
      title: "上传头像",
      options: {
        img: "", //裁剪图片的地址
        autoCrop: true, // 是否默认生成截图框
        autoCropWidth: 200, // 默认生成截图框宽度
        autoCropHeight: 200, // 默认生成截图框高度
        fixedBox: true // 固定截图框大小 不允许改变
      },
      previews: {}
    };
  },
  created() {
    if(this.userInfo.avatar == null || this.userInfo.avatar == ""){

    }else{
      this.options.img = process.env.NUXT_APP_BASE_API + this.userInfo.avatar;
    }
  },
  mounted() {
    document.querySelector(".avatar").style.width = this.size + "px";
    document.querySelector(".avatar").style.height = this.size + "px";
    document.querySelector(".user-info-head").style.height = this.size + "px";
  },
  methods: {
    ...mapMutations({
      SET_AVATAR: "user/SET_AVATAR"
    }),
    // 编辑头像
    editCropper() {
      this.open = true;
    },
    // 打开弹出层结束时的回调
    modalOpened() {
      this.visible = true;
    },
    // 覆盖默认的上传行为
    requestUpload() {
    },
    // 向左旋转
    rotateLeft() {
      this.$refs.cropper.rotateLeft();
    },
    // 向右旋转
    rotateRight() {
      this.$refs.cropper.rotateRight();
    },
    // 图片缩放
    changeScale(num) {
      num = num || 1;
      this.$refs.cropper.changeScale(num);
    },
    // 上传预处理
    beforeUpload(file) {
      if (file.type.indexOf("image/") == -1) {
        this.$message({
          message: "文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。",
          type: "error",
          duration: process.env.MSG_TIME
        });
      } else {
        const reader = new FileReader();
        reader.readAsDataURL(file);
        reader.onload = () => {
          this.options.img = reader.result;
        };
      }
    },
    // 上传图片
    uploadImg() {
      this.$refs.cropper.getCropBlob(data => {
        let formData = new FormData();
        formData.append("avatarfile", data);
        this.$api_user.uploadAvatar(formData).then(response => {
          this.open = false;
          this.options.img = response.imgUrl;
          this.SET_AVATAR(this.options.img);
          this.$message({
            message: "修改成功",
            type: "success",
            duration: process.env.MSG_TIME
          });
          this.visible = false;
        });
      });
    },
    // 实时预览
    realTime(data) {
      this.previews = data;
    },
    // 关闭窗口
    closeDialog() {
      // 把头像地址传递给父组件
      this.$emit("imgUrl", this.userInfo.avatar);
      this.options.img = process.env.NUXT_APP_BASE_API + this.userInfo.avatar;
      this.visible = false;
    }
  }
};
</script>
<style scoped>
.avatar{
  border-radius: 100%;
}
.user-info-head {
  position: relative;
  display: inline-block;
}
.user-info-head:hover:after {
  content: '+';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  color: #eee;
  background: rgba(0, 0, 0, 0.5);
  font-size: 24px;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  cursor: pointer;
  border-radius: 50%;
  text-align: center;
  padding-top: 35%;
}
.avatar-upload-preview{
  width: 200px;
  height: 200px;
  border-radius: 50%;
  -webkit-box-shadow: 0 0 4px #ccc;
  box-shadow: 0 0 4px #ccc;
  overflow: hidden;
}
</style>
